However, it will not protect mods from Orb of Scouring. It prevents attack mods from being rolled when you reroll the item with Orb of Alteration or Chaos Orb or add new mods with augmentation, Regal Orb or Exalted Orb. Then you remove the crafted mod when you have a nice 5 stat item and put the 6th stat on with either the Crafting Bench or another Exalted Orb. It would remove the ability to roll certain attack affixes. 'Cannot roll Attack mods' can be used on a weapon so that you can narrow down the possible affixes your exalt hits. This way the player can often limit the pool of possible mods so that outcome of the craft is almost guaranteed. Using the Cannot roll Attack Modifiers meta-crafting mod to combine multiple other meta-crafting mods allows for even more control of the item. 'Cannot roll Attack Modifiers' is a suffix(of Spellcraft).
Click this link to see all PoE Attack Modifier. Attack Modifiers: # to # Physical/Cold/Fire/Lightning Damage to Attacks, Attack Speed, Attacks Penetrate % Elemental Resistance (Influenced only), etc.